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After a short walk through the woods they spotted boxcars.

On a hotel rooftop in Hollywood, facing the glitterati tucked into the hills, Sierra Ferrell explained how to pack for a clandestine ride in a boxcar.

By summer, all but two families had departed their flooded homes and were living in boxcars or makeshift houses above the rising waterline.

Animals in circuses are hauled across the country in poorly ventilated trailers and boxcars for up to 50 weeks a year in all kinds of extreme weather.

Behind them were tens of thousands of Venezuelans and other migrants, trekking across the Darien Gap and into Central America, riding atop boxcars through Mexico, on their way.